DWSIM-3.4/C2/Introduction-to-Flowsheeting/English-timed

Time	Narration
00:01	Welcome to the spoken tutorial on Introduction to Flowsheeting in DWSIM.
00:07	In this tutorial, We will simulate a mixer.
00:10	Follow it up with a flash separator.
00:12	Learn how to give a two phase feed.
00:16	To record this tutorial, I am using DWSIM 3.4.
00:20	To practice this tutorial, you should have an exposure to DWSIM.
00:24	The prerequisite tutorials are mentioned on our website: spoken hyphen tutorial dot org.
00:31	Let me open DWSIM.
00:33	I have already opened a file flow-begin with two material streams.
00:40	I have selected Raoult’s law and the CGS system.
00:43	I went through file menu and the open option to get this. Let me close this.
00:53	This file is available at our "spoken tutorial" website.
00:56	You may download this and use it or you can manually enter the required information.
01:02	You can see two streams Inlet1 and Inlet2 in the flowsheet canvas.
01:08	The next slide summarizes the contents of this file.
01:13	When we mix these streams, we get equimolar composition.
01:17	We have chosen these values to easily verify the calculations of DWSIM.
01:23	Let us go back to DWSIM.
01:25	We will now modify the streams so as to have vapor in them.
01:31	Select Inlet 1.
01:34	At the top of the Properties tab, locate Specification. Click on it.
01:40	Press the down-arrow and choose Pressure and Vapor Fraction.
01:46	Scroll down and locate Molar Fraction Vapor Phase.
01:53	Enter 1 here, that is, the entire stream is a vapor.
02:00	In a similar way, make Inlet2 to have 50% Molar Fraction.
02:13	Now, let us insert a mixer to the flowsheet.
02:17	Locate the Mixer from the object palette. It is the third entry.
02:22	Click and drag it to the flowsheet.
02:24	Let us change the name of the mixer now.
02:29	Click on the Appearance tab. Delete the default name and enter Mixer.
02:36	Now let us insert an output stream for the mixer.
02:40	Click on Material Stream and drag it to the flowsheet.
02:45	We will close the automatic pop-up and not enter anything. Because, all output streams should be left unspecified.
02:54	We will change the name of this stream to mixer-out.
03:03	Let me connect the streams to the mixer.
03:05	Let me click the mixer once.
03:08	Properties show up in the Selected Object window.
03:12	You can see that the mixer has up to 6 inlet streams.
03:19	Let us click on Inlet Stream 1.
03:23	A down-arrow appears, indicating a menu.
03:27	Click this arrow and choose Inlet1.
03:32	Similarly, connect Inlet2 at Inlet Stream 2.
03:37	Locate the outlet port, mentioned as Connected to Outlet here.
03:43	Click on it and choose mixer-out.
03:49	We can move the streams to make them better aligned.
03:54	The mixer is red, as it is not calculated yet.
03:58	To the right of the configure simulation button is calculator.
04:02	It has several options.
04:03	The first one is the play button, to activate the solver. Press it.
04:09	Two buttons to the right of this are for Recalculate action. Click this button.
04:17	The mixer has become blue now, it means that the calculations are completed.
04:22	Now click on mixer-out stream.
04:27	We can see its calculated values in the Properties tab.
04:31	We can verify that its composition is as expected.
04:37	Double click Mixture.
04:40	It has equimolar composition.
04:43	Now let us insert a flash separator.
04:47	Let us scroll down the Object Palette.
04:51	Let us locate the Separator Vessel.
04:56	It can be used to simulate VLE, LLE and VLLE systems.
05:01	Click and drag it to the flowsheet.
05:06	We need to connect two output streams to the separator.
05:10	Let us drag the material stream.
05:13	We will leave it unspecified, as its properties are to be calculated.
05:20	We will name it as Vapour.
05:27	Similarly, create another stream and name it as Liquid.
05:32	Let us now connect the streams to the Separator.
05:36	In the first input port, we will connect mixer-out.
05:44	We can connect a total of five more input streams.
05:47	The separator mixes all the streams and separates. As a matter of fact, a separate mixer is not really required.
05:54	It also has a port to connect an energy stream
05:59	as we can see now.
06:02	These ideas will be taken up in the assignment section.
06:07	Let us connect the Vapour stream to the Vapour outlet port.
06:13	Similarly, connect the Liquid stream.
06:21	Once again, we can move the items for better alignment.
06:26	Notice that DWSIM completed the calculations automatically.
06:31	You are free to press the Recalculate button also.
06:35	In fact, you should do this whenever you are in doubt.
06:39	We now check whether the vapor and liquid are split properly in the separator.
06:45	Let us look at the vapor phase mole fractions of the stream Vapour.
06:52	The mole fraction of Benzene is 0.54.
06:56	Let us check whether this is in agreement with what mixer-out has.
07:04	You can see that DWSIM automatically displays vapor value. The benzene mole fraction is 0.54.
07:13	This is an indirect evidence that the Separator is working as expected.
07:18	We can do a check on the working of the Mixer also.
07:22	You can see the Mixture composition is equimolar, as expected.
07:29	We will postpone a few other checks to the Assignment Section.
07:34	Let us save this file using the save as option.
07:39	I will save it as flow-end.
07:46	I suggest that you keep saving your work frequently.
07:49	Let me summarize.
07:52	* We defined a simple flowsheet.
07:54	* Explained how to create mixed feed.
07:58	* Introduced mixer and separator.
08:00	* Showed how to connect them.
08:02	* Explained how to simulate.
08:04	Let me give some assignments.
08:07	The assignment in this slide has to do with mass balances.
08:10	I use blue colour to indicate streams and equipment.
08:15	Let us go to the next assignment.
08:16	You have to verify mole fractions as mentioned in this slide.
08:20	The third assignment has to do with the Separator.
08:25	Recall that we mentioned that it could be used to mix streams.
08:30	Remove the mixer and mixer-out and try it out.
08:35	In the next assignment, you will do the separation at a higher temperature.
08:41	Click on Separator. Let's scroll up.
08:46	Let us change Override separation temperature to true.
08:52	In the resulting field, change the value to 100.
08:59	Bring Energy stream from Object Palette to the Flowsheet. This is a new stream.
09:07	Connect this stream to the Energy Stream of the Separator that I showed earlier.
09:13	Simulate and analyze your results.
09:16	This is summarized in the slide here.
09:22	This video summarizes the Spoken Tutorial project.
09:26	If you do not have good bandwidth, you may download and watch it.
09:31	We conduct workshops using Spoken Tutorials; give certificates. Please contact us.
09:37	Do you have questions in this Spoken Tutorial?
09:39	Choose the minute and second where you have the question.
09:43	Explain your question briefly.
09:45	Someone from the FOSSEE team will answer them. Please visit this site.
09:51	The FOSSEE team coordinates coding of solved examples of popular books.
09:55	We give honorarium and certificates to those who do this.
10:00	For more details, please visit this site.
10:04	The FOSSEE team helps migrate commercial simulator labs to DWSIM.
10:09	We give honorarium and certificates for those who do this.
10:13	For more details, please visit this site.
10:17	Spoken Tutorial and FOSSEE projects are funded by NMEICT, MHRD, Government of India.
10:23	Thanks for joining. Good Bye.

Contributors and Content Editors

Nancyvarkey, PoojaMoolya, Sandhya.np14